Karzai did not provide any evidence to back up his claim, and he did not accuse the Pakistani government of having any role in the attack.

But the president says Afghan officials know with certainty that the suicide attacker who blew himself up Thursday during a meeting with Asadullah Khalid came from Pakistan.

At a news conference Saturday in Kabul, Karzai said Khalid was recovering from the wounds he sustained when the bomber — posing as a messenger of peace — detonated explosives that he had hidden inside his body.

Karzai said his government is investigating the attack and would raise the issue with Islamabad.